COVID-19 and news media bias
I'm inclined to say that something similar happened with Donald Trump's possible connections to Russia during the 2016 presidential campaign and early in his presidency, which is another thing that led to lots of accusations of media bias. I think the "fake consensus" there came about from the news reporting on people's *claims* of collusion which led to this view being amplified.
(Somewhat related: "The Media Very Rarely Lies" by Scott Alexander in Astral Codex Ten https://astralcodexten.substack.com/p/the-media-very-rarely-lies )